海藻粉和抗菌肽对肉鸡生长性能、免疫器官指数和肠道菌群的影响  

Effect of Dietary Seaweed Powder and Antibacterial Peptides on Growth Performance,Immune Organs Index and Intestinal Microflora of Broilers

作　　者：白建[1] 杜京旗[1] 郝旺林[1] 

机构地区：[1]吕梁学院生命科学系,山西吕梁033001

出　　处：《激光生物学报》2016年第2期170-177,共8页Acta Laser Biology Sinica

基　　金：吕梁学院校内基金(ZRXN201416)

摘　　要：为探讨海藻粉和抗菌肽不同添加水平对肉鸡生长性能、免疫器官指数和肠道菌群的影响.选取1日龄体重相近的AA肉鸡504羽,随机分为7个处理,每处理6个重复,每重复12羽.对照组饲喂基础日粮,试验组在基础日粮中添加不同水平（1.0%、3.0%、5.0%）的海藻粉和抗菌肽（300mg/kg、600mg/kg）.试验分前期（1～21d）和后期（22～42d）共42d.结果表明：（1）添加不同水平的海藻粉对前期、后期和全期肉鸡的料重比有显著影响（P〈0.05）;对21日龄肉鸡的脾脏指数和胸腺指数及对42日龄肉鸡的法氏囊指数差异显著（P〈0.05）;降低了21日龄和42日龄肉鸡盲肠大肠杆菌的数量（P〈0.05）,增加了盲肠乳酸菌的数量（P〈0.05）.（2）添加不同水平的抗菌肽对后期和全期肉鸡的料重比有显著差异（P〈0.05）;对21日龄肉鸡的脾脏指数和胸腺指数及对42日龄肉鸡的法氏囊指数差异显著（P〈0.05）;降低了21日龄和42日龄肉鸡盲肠大肠杆菌的数量（P〈0.05）,增加了盲肠乳酸菌的数量（P〈0.05）.（3）海藻粉和抗菌肽交互作用对前期、后期和全期肉鸡的料重比有明显影响（P〈0.05）;对21日龄肉鸡的脾脏指数和胸腺指数及对42日龄肉鸡的法氏囊指数差异显著（P〈0.05）;降低了21日龄和42日龄肉鸡盲肠大肠杆菌的数量（P〈0.05）,增加了盲肠乳酸菌的数量（P〈0.05）.本研究得出以下结论,海藻粉和抗菌肽能促进肉鸡生长,提高肉鸡免疫器官指数和改善肠道菌群,且二者间存在协同效应,添加5%的海藻粉和300mg/kg抗菌肽综合效果最佳.The aim of this study was to explore different levels of dietary seaweed powder and antibacterial peptides on growth performance,immune organs index and intestinal microflora of broilers. A total of 504 AA chickens with similar weight were randomly divided into 7 groups,with 6 replicates of 12 chicks in each replicate. Control group was fed with basal diet,experimental groups were added different dietary levels of seaweed powder( 1. 0%,3. 0%,5. 0%) and antibacterial peptides( 300 mg / kg、600 mg / kg). The experiment lasted for forty-two days which was divided into earlier stage( 1 ~ 21 d) and later stage( 22 ~ 42 d). Results indicated:( 1) The supplementation of dietary seaweed powder had significant effects on feed gain ratio in early,late and the whole period( P < 0. 05); Spleen index and thymus at 21 days of age and bursal index at 42 days of age had significant effect( P < 0. 05); E. coli and Lactobacillus in cecum of broiler had significant differences at 21 days of age and 42 days of age( P < 0. 05).( 2) The supplementation of dietary antibacterial peptides had significant effects on feed gain ratio in the late and the whole period( P < 0. 05); Spleen index and thymus at 21 days of age and bursal index at 42 days of age had significant effect( P < 0. 05); E. coli and Lactobacillus in cecum of broiler had significant differences at 21 days of age and 42 days of age( P < 0. 05).( 3) Interaction between seaweed powder and antibacterial peptides had significant effects on feed gain ratio in early,late and the whole period( P< 0. 05); Spleen index and thymus at 21 days of age and bursal index at 42 days of age had significant effect( P < 0.05); E. coli and Lactobacillus in cecum of broiler had significant differences at 21 days of age and 42 days of age( P <0. 05). It was concluded that seaweed powder and antibacterial peptides interaction had a significant effect on the growth,immune organs index and intestinal microflora of broiler. The suitable level of dietary is 5% seaweed powder and 300 mg / kg antibacte

关 键 词：肉鸡 海藻粉 抗菌肽 生长性能 免疫器官指数 肠道菌群 

分 类 号：S831.5[农业科学—畜牧学]